Observation of spin glass transition in spinel LiCoMnO4

doi:10.1088/1674-1056/24/12/127501

中国物理B ›› 2015, Vol. 24 ›› Issue (12): 127501-127501.doi: 10.1088/1674-1056/24/12/127501

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Observation of spin glass transition in spinel LiCoMnO₄

陈红^a, 杨旭^b, 张培松^a, 梁磊^a, 洪源泽^a, 魏英进^b, 陈岗^{b c}, 杜菲^b, 王春忠^{b c}

a College of Physics, Beihua University, Jilin 132013, China;
b Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, China;
c State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China

收稿日期:2015-06-01 修回日期:2015-08-10 出版日期:2015-12-05 发布日期:2015-12-05
通讯作者: Wang Chun-Zhong E-mail:wcz@jlu.edu.cn
基金资助:
Project supported by the National Key Basic Research Program of China (Grant No. 2015CB251103), the Development Program of Science and Technology of Jilin Province, China (Grant No. 20140101093JC), and the Program of Science and Technology of Jilin City, China (Grant No. 201434006).

Observation of spin glass transition in spinel LiCoMnO₄

Chen Hong (陈红)^a, Yang Xu (杨旭)^b, Zhang Pei-Song (张培松)^a, Liang Lei (梁磊)^a, Hong Yuan-Ze (洪源泽)^a, Wei Ying-Jin (魏英进)^b, Chen Gang (陈岗)^{b c}, Du Fei (杜菲)^b, Wang Chun-Zhong (王春忠)^{b c}

a College of Physics, Beihua University, Jilin 132013, China;
b Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, China;
c State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China

Received:2015-06-01 Revised:2015-08-10 Online:2015-12-05 Published:2015-12-05
Contact: Wang Chun-Zhong E-mail:wcz@jlu.edu.cn
Supported by:
Project supported by the National Key Basic Research Program of China (Grant No. 2015CB251103), the Development Program of Science and Technology of Jilin Province, China (Grant No. 20140101093JC), and the Program of Science and Technology of Jilin City, China (Grant No. 201434006).

摘要/Abstract

摘要： Spinel LiCoMnO₄ is prepared by solid-state reaction and its magnetic properties are comprehensively studied by direct current (DC) and alternating current (AC) susceptibilities, isothermal remanent magnetizations, and magnetic hysteresis. Fitting to the Curie-Weiss law by using high-temperature zero-field-cooled susceptibility confirms a low-spin state of Co³⁺ with S=0. Both the fitting parameters first increase and then tend to be saturated at high magnetic fields through using isothermal remanent magnetizations, which suggests a spin glass transition at low temperature. AC susceptibility study also supports this conclusion since the frequency dependence of peak position and intensity follows the tendency of a spin glass transition. The origin of the spin-glass transition in LiCoMnO₄ might be attributed to a spatial segregation between non-magnetic Co³⁺ regions and spin glass ordered regions of Mn⁴⁺ ions.

关键词: LiCoMnO₄, spin glass, DC susceptibility, AC susceptibility

Abstract: Spinel LiCoMnO₄ is prepared by solid-state reaction and its magnetic properties are comprehensively studied by direct current (DC) and alternating current (AC) susceptibilities, isothermal remanent magnetizations, and magnetic hysteresis. Fitting to the Curie-Weiss law by using high-temperature zero-field-cooled susceptibility confirms a low-spin state of Co³⁺ with S=0. Both the fitting parameters first increase and then tend to be saturated at high magnetic fields through using isothermal remanent magnetizations, which suggests a spin glass transition at low temperature. AC susceptibility study also supports this conclusion since the frequency dependence of peak position and intensity follows the tendency of a spin glass transition. The origin of the spin-glass transition in LiCoMnO₄ might be attributed to a spatial segregation between non-magnetic Co³⁺ regions and spin glass ordered regions of Mn⁴⁺ ions.

Key words: LiCoMnO₄, spin glass, DC susceptibility, AC susceptibility

中图分类号: (Conductivity phenomena in semiconductors and insulators)

72.20.-i

75.25.-j (Spin arrangements in magnetically ordered materials (including neutron And spin-polarized electron studies, synchrotron-source x-ray scattering, etc.)) 75.40.-s (Critical-point effects, specific heats, short-range order)

陈红, 杨旭, 张培松, 梁磊, 洪源泽, 魏英进, 陈岗, 杜菲, 王春忠. Observation of spin glass transition in spinel LiCoMnO₄[J]. 中国物理B, 2015, 24(12): 127501-127501.

Chen Hong (陈红), Yang Xu (杨旭), Zhang Pei-Song (张培松), Liang Lei (梁磊), Hong Yuan-Ze (洪源泽), Wei Ying-Jin (魏英进), Chen Gang (陈岗), Du Fei (杜菲), Wang Chun-Zhong (王春忠). Observation of spin glass transition in spinel LiCoMnO₄[J]. Chin. Phys. B, 2015, 24(12): 127501-127501.

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Observation of spin glass transition in spinel LiCoMnO₄

Observation of spin glass transition in spinel LiCoMnO₄

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